<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <style type="text/css">
        * {
            margin: 0;
            padding: 0;
        }
        
        .container {
            margin: 0 auto;
            padding-top: 30px;
            width: 1000px;
        }
        
        .btn {
            display: inline-block;
            padding: 0 30px;
            width: auto;
            height: 35px;
            font: 14px/35px 'microsoft yahei';
            color: #fff;
            border: 0;
            border-radius: 3px;
            text-align: center;
            cursor: pointer;
            -webkit-transition: all .5s;
            -moz-transition: all .5s;
            -ms-transition: all .5s;
            -o-transition: all .5s;
            transition: all .5s;
        }
        
        .blueBtn {
            background: #5dcbff;
        }
        /*蓝色按钮*/
        
        .blueBtn:hover {
            background: #40b6ee;
        }
        
        .orangeBtn {
            background: #ff5700;
        }
        /*橙色按钮*/
        
        .orangeBtn:hover {
            background: #e25d18;
        }
        
        .violetBtn {
            background: #6680ff;
        }
        /*紫色按钮*/
        
        .violetBtn:hover {
            background: #425de0;
        }
        
        .grayBtn {
            background: #999;
        }
        /*灰色按钮*/
        
        .grayBtn:hover {
            background: #7f7f7f;
        }
    </style>
</head>

<body>
    <div class="container">
        <span class="btn blueBtn">蓝色按钮</span>
        <span class="btn orangeBtn">橙色按钮</span>
        <span class="btn violetBtn">紫色按钮</span>
        <span class="btn grayBtn">灰色按钮</span>
    </div>
</body>

</html>